Rolling or reducing mill.



Patented Mar. 26, 1912.

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W. R. RE

LLING OR RED LIUATTON FILED .1 91 u 1,021,628. Patented Mar; 26, 1912.

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ia lifi WALTER R. REEVES, OF EAST PRO VIDENCE, RHODE ISLAND.

ROLLING R minnows MILL Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed March 17, 1911. Serial No. 615.111.

T0 at. whom it may concern:

Be it known that I, WALTER R. REEVES, a citizen of the United States,residing at East Providence, in the county of Providence and State ofRhode Island. have invented a new and useful Improvement in Rolling orReducing Mills, of which the following is a specification.

This invention relates to certain new and useful improvements in rollingor reducing mills and pertains more particularly to the driving meansfor the rolls.

In rolling or reducing mills the bottom roll is usually'the driven roll,the top roll being adjusted to givethedesired thickness to the metalbeing rolled by means of screws, the top roll being frictionally driven.It frequently happens that the metal cramps the top roll while at thesame time the bottom roll is revolved. resulting in an excess of heatwhich burns a flat place on the top roll. \Vhen this occurs the top rolthas to be removed, and a new one substituted therefor, and the old rollground to re We the flat place.

The object of the invention is to provide means whereby the aboveobjection is obviated, the invention contemplating the intermittentdriving of the top roll. in order to overcome the objection noted.

vIn the drawings: Figure 1 is a side elevation of a rolling millequipped with the present invention. Fig. is a section taken on the line'22 of Fig.3, and Fig. 3 is a fragmentary longitudinal sectional view ofthe device. for intermitte tly driving the top roll. I

'lhepower shaft is designated 1 in the drawings which has connectedthereto the power gear '2, the latter being in mesh with the roll gear 3carried by the shaft 4, the

' shaft 4t being secured to and driving the bot:

tom roll 5 of the mill. An auxiliary shaft (3 connects the power gear .2to the top roll 7 which latter is of less diameter than the roll 5 bymeans of a coupling which is interposed between the top roll ,7 and theshaft 6, the construction of which will now be described. The hub S ofthe top roll 7 is formed with a plurality of channels or grooves 9 inwhich integral extensions 10 of the ratchet wheel 11 project, wherebythe ratchet wheel is keyed to'the hub 8 of the top roll 7 in a manner torotate in unison with the latter. A housing 12 has aneck 13 formed atone end which latter is suitably keyed or otherwise rigidly secured tothe auxiliary shaft 6 so as to rotate therewith. A series of pawls l-lare secured within the housing 12 by means of bolts 15, the pawlsengaging the teeth of the ratchet wheel 11 as clearly clepic'ted,in Fig.2 of the drawings. Owing to the differ- -ence in the diameters of therolls the upper one will be driven faster than the shaft 6, but shouldthe roll for any reason stop or reduce its speed below that of the shaft6', the pawls will immediately enter into action and continue therotation of the top run, so that stoppage is prevented, or the formationof a place obviated. It will thus be seen that it is impossible for thetop roll to stop or reduceits speed below that of the shaft 6 since.while the top roll is capable of rotating or revolving at a faster orgreater speed than that of the shaft 6, still thelatterbv virtue ofcarryng the pawls 1* in its rotatioii will always assure rotation of thetop roll at the same speed as that of shaft 6.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a rolling mill, a power shaft having a gear, andan auxiliary shaft connected to the power shaft. 21. second shaft havingagear in mesh with said first gear, a bottom roll connected to saidsecond shaft. a top roll, and pawl and ratchet means between the toproll and said auxiliary shaft whereby thetop roll may rotate at a speedin excess ot that of the auxiliary shaft but not at a lower speed thanthat of the auxiliary shaft.

2. In a rolling mill. in combination with a power shaft. an auxiliaryshaft connected thereto. a bottom roll, means for driving the bottomroll from the power shaft. a top roll frietionally-engaged with thebottom roll and driven thereby. and a pawl and ratchet connectionbetween the top roll and the auxiliar shaft whereby the top roll isassuredof a speed of rotation atleast as fast as that of the auxiliaryshaft. said connection permitting the bottom roll to drive the top rollat a greater speed than that of the auxiliary shaft.

3. ln a rolling mill, in combination with the bottom roll and the toproll frictionally drive-n thereby. a driving source "connected to thebottom roll, and pawl and ratchet means between the driving source andthe top. roll whereby the top roll is positively a by the bottom roll.

4. In a rolling mill, a driving shaft, a bottom roll driven from thedriving shaft, a top roll driven from the bottom roll and pawl andratchet means connected to the top roll and to the driving shaft wherebythe top .roll is always positively driven atleast as fast as that of thedriving shaft and is capable of rotating at a greater speed than that ofthe driving shaft by said bottom roll.

5. In a rolling mill, a driving shaft, an auxiliary shaft, connectedthereto, a bottom roll, a connection between the bottom roll and thedriving shaft, a top roll frictionally driven by the bottom roll, aratchet wheel keyed to the top roll, and a housing keyed to theauxiliary shaft and carrying the series of pawls for engagement withsaid ratchet wheel whereby the top roll may be driven by the bottom rollat a greater speed than that at which the auxiliary shaft rotates.

6.-In a rolling mill, in combination with a bottom roll and a top rollfrictionally driven from the bottom roll, a driving means for the bottomroll and means including a pawl and ratchet whereby the top roll ispositively driven from the driving means but is capable of being rotatedat a greater speed than that imparted by said driving means to saidbottom roll.

7. In a rolling mill a top roll, a lower roll for frictionally drivingsaid top roll, means for positively driving the lower roll, and a nameto this specification in the presence of two subscribing witnesses.

WALTER R. REEV F79.

Witnesses:

LEON H. ALLEN, J. A. MILLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

